Human Gene Set: OCONNOR_PBMC_MENVEO_ACWYVAX_AGE_30_70YO
      _7DY_AFTER_SECOND_DOSE_VS_7DY_AFTER
      _FIRST_DOSE_DN


Standard name OCONNOR_PBMC_MENVEO_ACWYVAX_AGE_30_70YO_7DY_AFTER_SECOND_DOSE_VS_7DY_AFTER_FIRST_DOSE_DN
Systematic name M41178
Brief description Genes down-regulated in peripheral blood mononuclear cell 7d after second dose vs 7d after first dose in adult (30-70) after exposure to Menveo/ACWYVax , time point 7D. Comment: second dose at 28 days
Full description or abstract BACKGROUND: Neisseria meningitidis is a globally important cause of meningitis and septicaemia. Twelve capsular groups of meningococci are known, and quadrivalent vaccines against four of these (A, C, W and Y) are available as plain-polysaccharide and protein-polysaccharide conjugate vaccines. Here we apply contemporary methods to describe B-cell responses to meningococcal polysaccharide and conjugate vaccines. METHODS: Twenty adults were randomly assigned to receive either a meningococcal plain-polysaccharide or conjugate vaccine; one month later all received the conjugate vaccine. Blood samples were taken pre-vaccination and 7, 21 and 28 days after vaccination; B-cell responses were assessed by ELISpot, serum bactericidal assay, flow cytometry and gene expression microarray. RESULTS: Seven days after an initial dose of either vaccine, a gene expression signature characteristic of plasmablasts was detectable. The frequency of newly generated plasma cells (CXCR3+HLA-DR+) and the expression of transcripts derived from IGKC and IGHG2 correlated with immunogenicity. Notably, using an independent dataset, the expression of glucosamine (N-acetyl)-6-sulfatase was found to reproducibly correlate with the magnitude of immune response. Transcriptomic and flow cytometric data revealed depletion of switched memory B cells following plain-polysaccharide vaccine. CONCLUSIONS: These data describe distinct gene signatures associated with the production of high-avidity antibody and a plain-polysaccharide-specific signature, possibly linked to polysaccharide-induced hyporesponsiveness.
Collection C7: Immunologic Signature
      VAX: HIPC Vaccine Response
Source publication Pubmed 28137280   Authors: O'Connor D,Clutterbuck EA,Thompson AJ,Snape MD,Ramasamy MN,Kelly DF,Pollard AJ
Exact source Suppl Table 8 in additional file 9
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External links https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5282650/bin/13073_2017_400_MOESM9_ESM.xls
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Source species Homo sapiens
Contributed by HIPC SIGNATURES (NIAID/HIPC SIGNATURES)
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identifier namespace		 HUMAN_GENE_SYMBOL
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Version history 7.3: First Introduced.


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